CYTOGENETIC ANALYSIS OF MALPIGHIAN TUBULE AND SALIVARY-GLAND POLYTENECHROMOSOMES OF BACTROCERA-OLEAE (DACUS-OLEAE) (DIPTERA, TEPHRITIDAE)

Photomaps of the Malpighian tubule and the salivary gland polytene chr omosomes of Bactrocera oleae (Dacus oleae) are presented and compared with those of the fat body. Five polytene chromosomes (10 polytene arm s) corresponding to the five autosomes of the mitotic nuclei, as well as a heterochromatic mass corresponding to the sex chromosomes, are ob served in the nuclei of the three somatic tissues. The most prominent features of each polytene chromosome, the reverse tandem duplications, as well as the rather unusual ectopic pairing of the telomeric region s of different chromosome arms, are described. The constancy of the ba nding pattern based on the analysis of the three larval tissues is dis cussed.